Income Taxes (Details Narrative) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014
Income Tax Contingency [Line Items]
Income tax provision	$ 24,088,000	$ 18,747,000	$ 16,868,000
Anticipated tax credit under American Taxpayer Relief Act of 2012	500,000
Overall effective tax rate under American Taxpayer Relief Act of 2012		35.50%
Investment Tax Credit Carryforward [Member]
Income Tax Contingency [Line Items]
Income tax provision				(600,000)
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Income tax provision	$ 200,000